Working Paper

Class-Size Effects in School Systems Around the World: Evidence from Between-Grade Variation in TIMSS


  • Wößmann
  • L.
  • West
  • M.R.
Publication Date

We employ a combination of school fixed effects and IV estimation to estimate the effect of class size on student performance in 18 countries. Using the random part of the class-size variation between two adjacent grades within individual schools allows u


JEL Classification

Key Words

  • class size
  • educational production
  • instrumental variables
  • school fixed effects
  • student performance